superimposed drainage(epigenetic drainage) A drainage pattern that has been established on an earlier surface (perhaps conformable with the immediately underlying strata, and standing well above the present landscape). Subsequently the pattern was lowered by river incision so that it now lies across geologic structures to which it bears no relation.

superimposed drainage (epigenetic drainage) A drainage pattern that has been established on an earlier surface (perhaps conformable with the immediately underlying strata, and standing well above the present landscape). Subsequently the pattern was lowered by river incision so it now lies across geologic structures to which it bears no relation.